354 search results for "pca"

Revolution R Open Performance Improvements

January 11, 2016
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Revolution R Open Performance Improvements

Since last year Revolution Analytics has been publishing beta versions of Revolution R Open and finally in April this year they released RRO 8.0.3. The current release is RRO 3.2.2 (naming was adapted to fit the R version it is built upon). This post will give you an introduction on my favorite new features, how The post

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Health Care Indicators in Utah Counties

January 10, 2016
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Health Care Indicators in Utah Counties

The state of Utah (my adopted home) has an Open Data Catalog with lots of interesting data sets, including a collection of health care indicators from 2014 for the 29 counties in Utah. The observations for each county include measurements such as the infant mortality rate, the percent of people who don’t have insurance, what percent of...

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Repel overlapping text labels in ggplot2

January 8, 2016
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Repel overlapping text labels in ggplot2

A while back I showed you how to make volcano plots in base R for visualizing gene expression results. This is just one of many genome-scale plots where you might want to show all individual results but highlight or call out important results by labeling them, for example, with a gene name. But if you want to annotate...

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Multidimensional Scaling with R (from “Mastering Data Analysis with R”)

January 4, 2016
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Multidimensional Scaling with R (from “Mastering Data Analysis with R”)

Guest post by Gergely Daróczi. If you like this content, you can buy the full 396 paged e-book for 5 USD until January 8, 2016 as part of Packt’s “$5 Skill Up Campaign” at http://bit.ly/mastering-R Feature extraction tends to be one of the most important steps in machine learning and data science projects, so I decided to … Continue reading...

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Color Quantization in R

January 3, 2016
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Color Quantization in R

In this post, we'll look at a simple method to identify segments of an image based on RGB color values. The segmentation technique we'll consider is called color quantization. Not surprisingly, this topic lends itself naturally to visualization and R makes it easy to render some really cool graphics for the color quantization problem. ...

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Write in-line equations in your Shiny application with MathJax

December 30, 2015
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Write in-line equations in your Shiny application with MathJax

I've been working on a Shiny app and wanted to display some math equations. It's possible to use LaTeX to show math using MathJax, as shown in this example from the makers of Shiny. However, by default, MathJax does not allow in-line equations, because the dollar sign is used so frequently. But I needed to...

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Our R package roundup

December 30, 2015
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Our R package roundup

A year in review It’s the time of the year again where one eats too much, and gets in a reflective mood! 2015 is nearly over, and us bloggers here at opiateforthemass.es thought it would be nice to argue endlessly which R package was the best/neatest/most fun/most useful/most whatever in this year! Since we are in a festive mood, we decided...

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A Visualization of World Cuisines

December 28, 2015
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A Visualization of World Cuisines

In a previous post, we had ‘mapped’ the culinary diversity in India through a visualization of food consumption patterns. Since then, one of the topics in my to-do list was a visualization of world cuisines. The primary question was similar to that asked of the Indian cuisine: Are cuisines of geographically and culturally closer regions

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6 Machine Learning Visualizations made in Python and R

December 22, 2015
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6 Machine Learning Visualizations made in Python and R

These 6 visualizations were created in Plotly between 2014 and 2016 and are in some way related to machine learning. They were created using Plotly’s free and open-source graphing libraries for Python and R. 1. machine learning classifier comparison Made in Python by Étienne Tétreault-Pinard View the interactive version 2. COUNRIES WHERE AI IS MOST RESEARCHED Made in Python by Sebastian Raschka View the interactive version 3. 3D K-MEANS CLUSTERING WITH CUSTOM HOVER TEXT

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Importance of exports and economic growth, cross-country time series

December 11, 2015
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Importance of exports and economic growth, cross-country time series

Exports and economic growth I was looking to show a more substantive piece of analysis using the World Development Indicators data, and at the same time show how to get started on fitting a mixed effects model with grouped time series data. The relationship between exports’ importance in an economy and economic growth forms a good start as it...

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